How to Play

• Tap a cell, then tap a number 1–9 (or use your keyboard).
• Every row, column, and 3×3 box must contain digits 1–9 with no repeats.
• Toggle Notes to add pencil marks instead of filling the cell.
• Hint reveals one correct digit — you get 3 per game.
• Three mistakes ends the run (toggle Hardcore for 1 mistake).

Difficulty

• Easy ≈ 40 starting clues. Great for warm-ups.
• Normal ≈ 30 clues. The standard challenge.
• Hard ≈ 24 clues. Expect long deduction chains.

Daily Mode

• Daily generates the same puzzle for everyone today — seeded by the date.
• Win-streak tracks consecutive solves across all modes.

Keyboard

• 1–9 fill / add note · 0 / Backspace / Delete erase
• Arrows move selection · N toggle notes
• H hint · P / Esc pause · Ctrl+Z undo

Score

• 10000 − time(s) − 100×mistakes − 200×hints. Higher is better.